Chemical composition and antibacterial and antioxidant properties of commercial essential oils

Teixeira, Bárbara; Marques, António; Ramos, Cristina; Neng, Nuno R.; Nogueira, J.M.F.; Saraiva, Jorge A.; Nunes, María Leonor

doi:10.1016/j.indcrop.2012.07.069

Cited by 430 publications

(307 citation statements)

References 39 publications

Supporting

Mentioning

272

Contrasting

Unclassified

Order By: Relevance

“…The chemical composition of plant essential oils may vary according to species, part of the plant, season of harvesting and geographical origin [10,24]. In addition, the extraction methods can also influence the type and amount of molecules extracted [2,14].…”

Section: Discussionmentioning

confidence: 99%

Fragrance Chemicals in the Essential Oil of Mentha arvensis Reduce Levels of Mental Stress

Cho

Sowndhararajan²,

Jung³

et al. 2013

Journal of Life Science

View full text Add to dashboard Cite

The aim of this work was to determine the chemical composition of essential oil from aerial partsof Mentha arvensis L. f. piperascens (MAO) and to evaluate the effect of its fragrant chemicals on electroencephalographic (EEG) activity of human brain. The MAO was obtained by supercritical CO2 extraction. The maximum yield was 2.38% at conditions of 70ºC and 200 bar. There were 32 volatile chemicals with 6 alcohols (67.11%), 13 hydrocarbons (17.05%), 9 esters (11.50%), 2 ketones (7.16%), 1 oxide (2.77%), and 1 aldehyde (0.56%). The major components were (Z,Z,Z)-9,12,15-octadecatrien-1-ol (50.06%), 2-hydroxy-4-methoxyacetophenone (7.50%), and 3,4-dihydro-8-hydroxy-3-methyl-1H-2-benzopyran-1-one (6.60%). Results of the EEG study showed that inhalation of MAO significantly changed the EEG power spectrum values of relative gamma, relative fast alpha, and spectral edge frequency 90%. During the inhalation of MAO, the value of relative fast alpha was significantly increased (p<0.05). On the other hand, the values of gamma and the spectral edge frequency 90% were significantly decreased (p<0.05). The present study suggests that fragrant chemicals of essential oil of M. arvensis reduce the level of mental stress and that they could be used in the treatment of psychophysiological disorders.

show abstract

Section: Discussionmentioning

confidence: 99%

Fragrance Chemicals in the Essential Oil of Mentha arvensis Reduce Levels of Mental Stress

Cho

Sowndhararajan²,

Jung³

et al. 2013

Journal of Life Science

View full text Add to dashboard Cite

show abstract

“…Artemisia dracunculus is one of the Artemisia members with numerous usage (19). Although there are some published reports on free radicals scavenging and antioxidant activity of A. dracunculus (20)(21)(22), there is no comprehensive study to evaluate antioxidant activity of various extracts as well as the essential oil of the plant.…”

Section: Introductionmentioning

confidence: 99%

Phytochemical Evaluation and Antioxidant Activity of Essential Oil, and Aqueous and Organic Extracts of Artemisia dracunculus

Rajabian

Khayyat

Emami

et al. 2016

Jundishapur J Nat Pharm Prod

View full text Add to dashboard Cite

show abstract

“…The use of commercial antioxidants increases the production cost of biodiesel. The essential oil with the highest anti-oxidative properties is clove bud oil (Teixeira et al, 2013). The effect of different clove bud oil concentrations on the oxidative stability is presented in Figure 6.…”

Section: Oxidation Stabilitymentioning

confidence: 99%

Biodiesel production from butter factory effluent

Schabort¹,

Visser²,

Venter³

et al. 2014

Afr. J. Biotechnol.

View full text Add to dashboard Cite

The increase in energy demand coupled with the depletion of fossil fuels has increased the need for renewable and sustainable energy sources. Butter waste effluent was identified as a possible feedstock for biodiesel. The effects of the temperature, alcohol to oil molar ratio, catalyst concentration and the reaction time were investigated to determine the optimal reaction conditions of the transesterification reaction. The optimal reaction conditions according to the results were 50°C, 6:1 alcohol to oil molar ratio, 1.0 to 1.2 wt% catalyst loads and a reaction time of 60 to 90 min. Different methods of purification were investigated in an attempt to decrease waste of a biodiesel plant, including the dry washing agents, Magnesol ® D-SOL TM and Purolite ® PD-206. The Magnesol ® D-SOL TM was found to be the optimum method for lowering the water content and the acid value of the fuel. The biodiesel was tested according to the SANS 1935:2011 standard and did not meet the requirements of the standard with regard to flash point, sulphur content, carbon residue, oxidation stability, free glycerol, total glycerol and cold filter plugging point. In order for the biodiesel to be suitable for commercial use, it should be blended with mineral diesel.Key words: Transesterification, butter waste, biodiesel purification, reaction kinetics. INTRODUCTIONWith the ever-increasing world population, there is an increasing demand for energy (BP, 2012; United Nations, 2011). The increasing energy demand is putting a strain on the fossil fuel reserves and therefore increasing fuel prices. The need for sustainable, renewable fuel sources cannot be emphasised enough. Biofuels have been investigated as an alternative to fossil fuels. The feedstock for biofuels has changed during the last years from edible to non-edible, and finally to waste sources. The change was driven by the food versus fuel debate, that is, the unethical use of food for fuel (Ewing and Msangi, 2009). The use of waste fats and oils for biodiesel has been the focus of recent research. The waste from a butter factory in Frankfort (Free State Province, South Africa) was identified as a possible feedstock for biodiesel production. The waste is produced during cleaning processes. The effluent (a mixture of oil and water) from the factory is collected in a settling pit. The water is separated from the oil and discarded into the municipal sewerage. The oil is removed and stored. Fines are issued by the municipality for dumping fat in the sewerage system in an effort to reduce the environmental impact of the industries in the area. Pereira et al. (2003) observed toxic conditions in sediments which were polluted with linseed and sunflower oil. The waste should thus be disposed of in an environmentally friendly manner and this increases the production cost.The fatty waste can be used to produce biodiesel, which can in turn be used to fuel machinery at the factory. This will decrease the overall production cost of the factory by decreasing disposal costs and operating costs. The...

show abstract

Chemical composition and antibacterial and antioxidant properties of commercial essential oils

Cited by 430 publications

References 39 publications

Fragrance Chemicals in the Essential Oil of Mentha arvensis Reduce Levels of Mental Stress

Fragrance Chemicals in the Essential Oil of Mentha arvensis Reduce Levels of Mental Stress

Phytochemical Evaluation and Antioxidant Activity of Essential Oil, and Aqueous and Organic Extracts of Artemisia dracunculus

Biodiesel production from butter factory effluent

Contact Info

Product

Resources

About